Violin-bow.



P. O. ANDERSON.

VIOLIN BOW.

APPLICATION FILED DEC. 3. 1913.

Patented Aug. 31, 1915.

JV Zj Z4 inventor Attorneys PHILIP O. ANDERSON, OF BOISE, IDAHO.

VIOLIN-BOW.

Application filed December 3, 1913.

To all whom it may concern:

Be it known that I, PHILIP O. ANDERSON, citizen of the United States,residing at Boise, in the county of Ada and State of Idaho, haveinvented a new and useful Violin-Bow, of which the following is aspecification.

This invention relates to violin bows, and more particularly to anadjusting device for the frog.

The object of the invention is the provision of a novel and improvedadjuster for the frog, whereby the adjustment of the frog may beaccomplished easily and accurately.

The present invention also has for its object the provision of anadjuster for violin bows, embodying a unique assemblage of componentparts, whereby the adjuster may be readily operated, and whereby thesame may be readily applied to the bow, the said device beingcomparatively simple, nonencumbering and inexpensive in construction, aswell as being convenient, practical and eflicient in its use.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the drawings-Figure 1 is a fragmental side elevation of a violin bowembodying the improved adjuster. Fig. 2 is an enlarged sectional detailview of the ad uster. Fig. 3 is a cross section on the line a-a/ of Fig.2. Fig. 4 is a cross section on the line ?9Z) of Fig. 2. Fig. 5 is anelevation of another form of the invention, partly broken away.

In the drawings, the numeral 1 indicates the staff which is of usualconstruction, and 2 indicates the sliding frog having the hairs 3secured or anchored thereto in any well known manner. A nut member 4 hasa threaded shank engaged into the frog and the nut projects into thehollow or socketed end of the staif 1.

The adjusting device for the frog, comprises an adjusting screw 6projecting into the hollow or socketed end of the staff 1, and havingits shank5 projecting outwardly, and provided with an outwardly facingSpecification of Letters Patent.

Patented Aug. 31, 1915.

Serial No. 804,521.

shoulder 7. The protruding end of the screw shank 5 is provided with theoppositely extending screw threads 8 and 9.

A. cap 10 has its annular rim 11 engaged over the end of the staff 1over the mouth of the socket or recess in the end of the staff, wherebythe cap 10 is secured firmly to the staff. The shoulder 7 of the shankbears against the inner side of the cap 10 to prevent the withdrawal ofthe screw from the cap, and the cap will therefore retain the screw 6 inplace within the end of the staff 1. The outer side of the cap 10 isprovided with an annular flange 12. The screw shank 5 is ournaledthrough the cap 10 and protrudes from the outer side thereof.

The button 13 is mounted upon the pro truding portion of the shank 5,and is threadedly engaged to the screw threads 8 of the shank, and a jamor retaining nut 14: is threaded upon the screw threads 9 of the shankfor binding or holding the button 13 rigidly in place upon the shank ofthe adjusting screw. The inner end of the button 13 is reduced so as tofit rotatably within the annular flange 12 of the cap 10.

The button 13 is secured upon the protruding portion of the screw shankadjacent the cap 10, and the adjacent faces of the cap and button areprovided with cooperating annular ball. races between which bearingballs 16 are disposed, the balls working within the ball races forproviding an anti-frictional bearing between the cap 10 and button 13.The flange 12 of the cap 10 in overlapping the reduced end portion 15 ofthe button 13, will inclose the bearing balls 16, to exclude dust andother extraneous matter, even though the button 13 reciprocates slightlyrelative to the cap 10.

It will thus be obvious that when the cap 10 is engaged over the end ofthe staff 1, so that the screw 6 engages through the nut member 4 of thefrog 2, the button 13 being rotated, will cause the frog to be adjustedlongitudinally along the staff 1. The antifrictional bearing between thebutton 13 and cap 10 enables the button to be readily rotated forobtaining an easy and accurate adjustment of the frog. The cap 10provides a convenient bearing for the button, for the provision of theanti-frictional balls between the cap or bearing 10 and the button 13,and the cap also enables the adjusting device to be readily applied tothe end of the staff.

In the form of the invention illustrated in Fig. 5, the same generalconstruction as above described is present, with some changes andadditions. The adjusting screw 18 has the shank 17, and the cap 21 whichis engageable over the end of the staff, has the shank 17 journaledtherethrough. The button, in this form, comprises a body portion orsection 19, and a cap or section 22 engaged over the reduced inner endof the body portion or section 19 and arranged adjacent the cap 21. Theshank 17 is provided with annular grooves 20 adjacent the remote sidesof the caps 21 and 22, and spring rings 23 are engaged within thegrooves 20 and bear against the remote sides of the caps 21 and 22 tohold them together, and to hold the screw and cap of the button againstoutward movement relative to the cap 21. The adjacent sides of the caps21 and 22 are provided with cooperating annular ball races, betweenwhich the bearing balls 24 are disposed to work within the ball racesfor providing the antifrictional bearing.

With the form illustrated in Fig. 5, the caps 21 and 22 may be readilyassembled upon the shank 17, in which event the spring or split rings 23may be snapped within the grooves 20 for locking the caps in place uponthe shank, and then the body portion or section 19 of the button may beapplied to the shank and cap 22.

What is claimed is 1. A violin bow adjuster embodying a cap, anadjusting screw having its shank journaled through the cap andprotruding from one side thereof, the screw shank having means bearingagainst the other side of the cap for preventing the withdrawal of thescrew from the cap, and a button secured upon the protruding portion ofthe screw shank adjacent the cap.

2. A violin bow adjuster embodying a cap, an adjusting screw having itsshank journaled through the cap and protruding from one side thereof, abutton secured upon the protruding portion of the screw shank andcomprising a body portion and a cap engaged over the inner end of thebody portion and arranged adjacent the aforesaid cap, and means carriedby the screw shank and engaging the remote faces of the two caps to holdthe parts together.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

A, F. GRAVES, WILLIAM BIOPELLE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G.

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